程式碼

import os
from PIL import Image
import tkinter
import tkinter.filedialog
import tkinter.messagebox


class Window():
  def __init__(self):
    self.root = root = tkinter.Tk()
    self.menu = tkinter.Menu(root)
    self.submenu = tkinter.Menu(self.menu,tearoff=0)
    self.submenu.add_command(label='作者:君莫笑')
    root.config(menu=self.submenu)
    self.Image = tkinter.StringVar()
    self.Image.set('.bmp')
    self.mstatus = tkinter.IntVar()
    self.fstatus = tkinter.IntVar()
    self.mstatus.set(0)
    self.fstatus.set(0)
    self.status = tkinter.StringVar()
    self.label = tkinter.Label(root,text='輸入百分比')
    self.label.place(x=5,y=5)
    self.entryNew = tkinter.Entry(root)
    self.entryNew.place(x=70,y=5)
    self.checkM = tkinter.Checkbutton(self.root,text='批量轉換',command=self.OnCheckM,variable=self.mstatus,onvalue=1,offvalue=0)
    self.checkM.place(x=5,y=30)
    self.label = tkinter.Label(root,text='選擇檔案')
    self.label.place(x=5,y=55)
    self.entryFile = tkinter.Entry(root)
    self.entryFile.place(x=70,y=55)
    self.BrowserFileButton = tkinter.Button(root,text='瀏覽',command=self.BrowserFile)
    self.BrowserFileButton.place(x=220,y=55)
    self.label = tkinter.Label(root,text='選擇目錄')
    self.label.place(x=5,y=90)
    self.entryDir = tkinter.Entry(root,state=tkinter.DISABLED)
    self.entryDir.place(x=70,y=90)
    self.BrowserDirButton = tkinter.Button(root,command=self.BrowserDir,state=tkinter.DISABLED)
    self.BrowserDirButton.place(x=220,y=90)

    self.checkF = tkinter.Checkbutton(root,text='改變檔案格式',offvalue=0,variable=self.fstatus,command=self.OnCheckF)
    self.checkF.place(x=5,y=120)

    frame = tkinter.Frame(root,)
    frame.place(x=10,y=150)
    self.rBmp = tkinter.Radiobutton(frame,variable=self.Image,value='.bmp',text='BMP',state=tkinter.DISABLED)
    self.rBmp.pack(anchor='w')
    self.rJpg = tkinter.Radiobutton(frame,value='.jpg',text='JPG',state=tkinter.DISABLED)
    self.rJpg.pack(anchor='w')
    self.rPng = tkinter.Radiobutton(frame,value='.png',text='PNG',state=tkinter.DISABLED)
    self.rPng.pack(anchor='w')
    self.rGif = tkinter.Radiobutton(frame,value='.gif',text='GIF',state=tkinter.DISABLED)
    self.rGif.pack(anchor='w')
    self.ButtonCov = tkinter.Button(root,text='轉換格式',command=self.Conv,)
    self.ButtonCov.place(x=120,y=180)
    self.statusLabel = tkinter.Label(root,textvariable=self.status,fg='red')
    self.statusLabel.place(x=80,y=220)

  def OnCheckM(self):
    if not self.mstatus.get():
      self.entryDir.config(state=tkinter.DISABLED)
      self.entryFile.config(state=tkinter.NORMAL)
      self.BrowserFileButton.config(state=tkinter.NORMAL)
      self.BrowserDirButton.config(state=tkinter.DISABLED)
    else:
      self.entryDir.config(state=tkinter.NORMAL)
      self.entryFile.config(state=tkinter.DISABLED)
      self.BrowserFileButton.config(state=tkinter.DISABLED)
      self.BrowserDirButton.config(state=tkinter.NORMAL)

  def OnCheckF(self):
    if not self.fstatus.get():
      self.rBmp.config(state=tkinter.DISABLED)
      self.rPng.config(state=tkinter.DISABLED)
      self.rJpg.config(state=tkinter.DISABLED)
      self.rGif.config(state=tkinter.DISABLED)
    else:
      self.rBmp.config(state=tkinter.NORMAL)
      self.rPng.config(state=tkinter.NORMAL)
      self.rJpg.config(state=tkinter.NORMAL)
      self.rGif.config(state=tkinter.NORMAL)

  def BrowserFile(self):
    file = tkinter.filedialog.askopenfilename(title='Python player',filetypes=[('JPG','*.jpg'),('BMP','*.bmp'),('GIF','*.gif'),('PNG','*.png')])
    if file:
      self.entryFile.delete(0,tkinter.END)
      self.entryFile.insert(tkinter.END,file)

  def BrowserDir(self):
    directory = tkinter.filedialog.askdirectory(title='Python')
    if directory:
      self.entryDir.delete(0,tkinter.END)
      self.entryDir.insert(tkinter.END,directory)

  def make(self,file,format=None):
    im = Image.open(file)
    mode = im.mode
    if mode not in ('L','RGB'):
      im = im.convert('RGB')
    width,height = im.size
    s = self.entryNew.get()
    if s == '':
      tkinter.messagebox.showerror('出錯啦','請輸入百分比')
      return
    else:
      n = int(s)
    nwidth = int(width * n / 100)
    nheight = int(height * n / 100)
    thumb = im.resize((nwidth,nheight),Image.ANTIALIAS)
    if format:
      thumb.save(file[:(len(file) - 4)] + '_thumb' + format)
    else:
      thumb.save(file[:(len(file) - 4)] + '_thumb' + file[-4:])

  def Conv(self):
    n = 0
    if self.mstatus.get():
      path = self.entryDir.get()
      if path == "":
        tkinter.messagebox.showerror('出錯啦','請選擇路徑')
        return
      filenames = os.listdir(path)
      if self.fstatus.get():
        f = self.Image.get()
        print(f)
        for filename in filenames:
          if filename[-3:] in ('bmp','jpg','gif','png'):
            self.make(path + '/' + filename,f)
            n += 1
      else:
        for filename in filenames:
          if filename[-3:] in ('bmp','png'):
            self.make(path + '/' + filename)
            n += 1
    else:
      file = self.entryFile.get()
      if file == '':
        tkinter.messagebox.showerror('出錯啦','請選擇檔案')
        return
      if self.fstatus.get():
        f = self.Image.get()
        self.make(file,f)
        n += 1
      else:
        self.make(file)
        n += 1
    self.status.set('成功轉換 %d 張圖片' % n)

  def mainloop(self):
    self.root.minsize(280,270)
    self.root.maxsize(280,250)
    self.root.title('圖片轉換')
    self.root.mainloop()


if __name__ == "__main__":
  window = Window()
  window.mainloop()

執行效果：

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